linux-kernel - Re: [PATCHv2 next] ptp: update gettimex64 to provide ts optionally in mono-raw base.

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Message-ID: <20240418185524.18801983@kernel.org>
Date: Thu, 18 Apr 2024 18:55:24 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Mahesh Bandewar <maheshb@...gle.com>
Cc: Netdev <netdev@...r.kernel.org>, Linux <linux-kernel@...r.kernel.org>,
 David Miller <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Paolo Abeni <pabeni@...hat.com>, Thomas Gleixner <tglx@...utronix.de>,
 Richard Cochran <richardcochran@...il.com>, Arnd Bergmann <arnd@...db.de>,
 Sagi Maimon <maimon.sagi@...il.com>, Jonathan Corbet <corbet@....net>, John
 Stultz <jstultz@...gle.com>, Mahesh Bandewar <mahesh@...dewar.net>
Subject: Re: [PATCHv2 next] ptp: update gettimex64 to provide ts optionally
 in mono-raw base.

On Wed, 17 Apr 2024 21:27:06 -0700 Mahesh Bandewar wrote:
> --- a/include/uapi/linux/ptp_clock.h
> +++ b/include/uapi/linux/ptp_clock.h
> @@ -157,7 +157,12 @@ struct ptp_sys_offset {
>  
>  struct ptp_sys_offset_extended {
>  	unsigned int n_samples; /* Desired number of measurements. */
> -	unsigned int rsv[3];    /* Reserved for future use. */
> +	/* The original implementation provided timestamps (always) in
> +	 * REALTIME clock-base. Since CLOCK_REALTIME is 0, adding
> +	 * clockid doesn't break backward compatibility.
> +	 */
> +	clockid_t clockid;	/* One of the supported clock-ids */
> +	unsigned int rsv[2];    /* Reserved for future use. */

This suffers from a moderate inability to build:

usr/include/linux/ptp_clock.h:164:2: error: unknown type name 'clockid_t'
  164 |         clockid_t clockid;      /* One of the supported clock-ids */
      |         ^
-- 
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